Secondary Electron Interference from Trigonal Warping in Clean Carbon Nanotubes

被引：12

作者：

Dirnaichner, A. ^{[1
,2
]}

del Valle, M. ^{[2
]}

Goetz, K. J. G. ^{[1
]}

Schupp, F. J. ^{[1
]}

Paradiso, N. ^{[1
]}

Grifoni, M. ^{[2
]}

Strunk, Ch. ^{[1
]}

Huettel, A. K. ^{[1
]}

机构：

[1] Univ Regensburg, Inst Expt & Appl Phys, D-93040 Regensburg, Germany

[2] Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany

来源：

PHYSICAL REVIEW LETTERS | 2016年 / 117卷 / 16期

关键词：

FABRY-PEROT INTERFERENCE; RESONATORS; SPIN;

D O I：

10.1103/PhysRevLett.117.166804

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate Fabry-Perot interference in an ultraclean carbon nanotube resonator. The conductance shows a clear superstructure superimposed onto conventional Fabry-Perot oscillations. A sliding average over the fast oscillations reveals a characteristic slow modulation of the conductance as a function of the gate voltage. We identify the origin of this secondary interference in intervalley and intravalley backscattering processes which involve wave vectors of different magnitude, reflecting the trigonal warping of the Dirac cones. As a consequence, the analysis of the secondary interference pattern allows us to estimate the chiral angle of the carbon nanotube.

引用

页数：5

共 29 条

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[2]

Datta S., 1997, Electronic Transport in Mesoscopic Systems, P377

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